A Vast Amount of men and military equipment forged together to form a large combat group which usually consists out of 2000 - 5000 men. However this was in the time of the romans and there were cases known of far greater legions. There is no maximal amount.

My legion marches onward in order to pillage, burn and annihilate all opposing forces. Muhahaha

Legions are the fans of a group called Deadsy. Deadsy is an American synth rock band from California. They are wildly known for being the founders of the sub-genre Undercore, as they would not fit under any other genre label. They have played many shows mainly based in California, but have grown to tour multiple times on the now renowned Family Values Tour.